Green Book is the real life account of Jamaican born pianist Don Shirley's musical tour through the Deep South during the Jim Crow era. Shirley (Mahershala Ali) enlists the services of rough and tough New York City bouncer Tony Lip (Viggo Mortensen) as his personal chauffeur and bodyguard as he performs jazz piano sets through a section of America where he is most unwelcome. While the duo's personalities and lifestyles clash at first, their bond on the road strengthens as they each navigate the culture shock and harsh racism of the 1960s American South in their own ways.